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Answers for “长方体展开图有多少个面?”

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Meet the concept

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A rectangular prism has six rectangular faces, and in the nets shown these six rectangles remain visible after unfolding. The narration also points out that the rectangles occur in pairs, matching opposite faces of the prism.

Conditions: The solid is a rectangular prism.; The net shows all faces without overlap.

Meet the concept

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A polyhedron net is a flat layout obtained by cutting along edges of a 3D solid and unfolding it so that all faces remain connected in one piece. In this clip, the example shown is a rectangular prism whose six rectangular faces become one connected planar figure.

Conditions: The object is a 3D solid (polyhedron).; The faces are laid flat.; The resulting faces form one connected complex polygon.

Understand why

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The same polyhedron can have multiple valid nets because changing how the net is oriented on the page or choosing different edges to cut does not change which solid it represents. Different unfoldings of the same rectangular prism are still nets of that same solid.

Conditions: The underlying solid remains the same.; Different cuts or fold sequences may produce different layouts.